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Transcript of Registering Earth Science Data and Data Related Services Using NASA’s Global Change Master...
Registering Earth Science Data and Data Related Services Using NASA’s Global Change Master
Directory (GCMD)
Tyler Stevens (GIS/Services Coordinator)ESIP Federation Meeting
Technical Breakout Session 2AJanuary 9, 2008
Discussion Outline
I. Why Register in the GCMD?
II. Registering Data Sets and Services
III. Additional Registration Methods
IV. Demonstration of Metadata Authoring
Tool
I. Why Register in the GCMD?
1. For Enhanced Data and Service Discovery-Controlled Science Keywords, Ancillary
Keywords (Data Centers, Instruments, Projects,
Platforms, Locations)-Keyword Refinements
2.For Direct Access to Data and Services-Related URL > Get Data-Related URL > Get Service
3. For Metadata Content and Wide Usage
4. For Metadata Interoperability-FGDC, ISO
1. Enhanced Data Discovery Through GCMD’s Controlled
Keyword Sets• Science Keywords• Services Keywords• Locations• Instruments *• Platforms *• Spatial/Temporal
Data Resolution Range
• URL_Content Type• Chronostratigraphic
Units• ISO Topic Category• Data Set Language• Data Centers *• Personnel *• Projects *
• *Authors may create new entries, but software checks for uniqueness & consistency.
• Unique Entry_IDs are also assured.• Required
1. Enhanced Data Discovery Through Keyword Refinements
Keyword Refinement
Options
Refine by Category Full Text
“Breadcrumbs”
2. Direct Access to Data and Services
GET SERVICE > ACCESS MAP VIEWER
Provides access to geo-referenced geospatial data in a web interface.
Got Data?
GET DATA
3. Metadata Content
3. Wide Usage
North America
Europe
Asia
Australia
South America
Africa
Other
January 2007- December 2007
Global Usage
1. Develop an XSLT Stylesheet based on mapping
XSLT Editor
Sample FGDC XML document
Edit XSLT Stylesheet
DIF XML
FGDC XML Formatted DIF XML
Translate using Xalan
Format using HTML Tidy
DIF HTML
2. Translate and Format Document
4. Metadata Interoperability
3. Submit to the GCMD
II. Registering Data Sets and Services
Online Metadata Authoring Tool
Validate
Preview
Submit to GCMD
Metadata in Queue
QA/QC Metadata and Load Into Database
Metadata In Database
Retrieve from Database to Update
III: Additional Registration Methods
• Metadata Harvesting/Metadata Transfer OAI-PMH Z39.50
• Bulk Metadata Transfer/Ingest
Why OAI-PMH?
OAI Server independent of main database
Administrator controls metadata availability
Queries standardized
Software is open source
Metadata Compatibility
•Dublin Core, FGDC, DIF, ISO-19115
•XSLT or XML Schema
Database
Computer running harvester software
OAI-PMH Repository
I.I.
II.II.
OAI-PMH Architecture for Metadata Harvesting
Metadata Transfer/Ingest
Z39.50
Rsync
FTP
Bulk XML
GCMD Coordinators
Metadata In Database
OAI-PMH
Validate
Publish
IV. Demonstration of Metadata Authoring Tool
Thank You
Tyler Stevens (GIS/Services Coordinator)[email protected]
Special Thanks to GCMD staff for their assistance and contributions.
Picture Credit: Home Town USA Inc – Washington D.C.